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Physical Modelling of the Drained Flow on a Suction Box of a Papermachine

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journal of Chemistry and Chemical Engineering 2011年第2期5卷 165-169页

作者： jean-claude Roux Martine Rueff Laboratory of Pulp and Paper Science and Graphic Arts Grenoble Institute of Technology - Pagora 461 rue de la papeterie38400 Saint-Martin d ＇Hbres France

Suction boxes are used in the paper industry to simultaneously drain a pulp suspension and form a fibre mat （or filter cake）. This research addresses the modelling of fibre deposition in the forming unit of an industrial papermachine, assuming a filtration process, and that of the flowing suspension drained through the building fibre mat and the wire on a suction box. From experimental data of the cumulative drained V volume, per unit surface area, for two vacuum pressures △P and 6 dwell times t, an extension of the classical law （t/V） versus V is proposed, validated and applied. This relation enables determining the average specific filtration resistance of the fibre mat over the box and the mass of solids deposited before and over the suction box. The model obtained is as precise as 1% and can be used to limit and reduce the energy consumption of drainage vacuum assisted devices such as suction boxes in the forming unit of industrial papermachines.

关键词： Papermachine suction box physical modelling specific filtration resistance fibre deposition "dead-end" filtration

Bi-phasic Simulation of Metal Injection Moulding:Constitutive Determinations

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journal of Southwest jiaotong University(English Edition) 2003年第2期11卷 122-130页

作者：柳葆生 Barriere Thierry Gelin jean-claude Department of Engineering Mechanics Southwest Jiaotong University LMARC Franche-Comt University

To predict the segregation effect in metal injection moulding (MIM) injection, a bi-phasic model based on mixture theory is adopted in simulation. An explicit algorithm is developed and realized by the authors, which conducts the simulation to be a cost-effective tool in MIM technology. In case of the bi-phasic simulation, the viscosity behaviours are necessary to be determined for the flows of each phase while only the viscosity of mixture is measurable by tests. It is a crucial problem for application of the bi-phasic simulation of MIM injection. A reasonable method is hence analysed and proposed to determine the viscosity behaviours of each phase. Even though this method may be furthermore modified in the future, it results in the practical simulation of segregation effects with reasonable parameters. The simulation results are compared with the measurements on injected specimens.

关键词： metal injection moulding bi-phasic simulation viscous behaviours mixture theory

The Need of Incorporating Indigenous Knowledge Systems into Modern Weather Forecasting Methods

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journal of Geoscience and Environment Protection 2021年第2期9卷 55-70页

作者： Olivier Irumva Gratien Twagirayezu jean claude Nizeyimana School of Eco-Environmental Engineering Guizhou Minzu University Guiyang China School of Environmental and Municipal Engineering Lanzhou Jiaotong University Lanzhou China School of Environment Northeast Normal University Changchun China

The study was aimed to examine the need of incorporating traditional weather forecasting renowned indigenous knowledge system (IKS) into modern weather forecasting methods to be used for planning farming activities. In addition, not only gap that is not infused by current weather forecasting system with their advanced studies to understand why it is incorporated into existing technical frameworks was regarded, but also the limitation of advanced weather forecasting approach and strength to be elicited by indigenous knowledge system are crucial. Perspicuously, forms and onsite interrogates have been conducted to assess people’s beliefs, understanding, and attitudes on the indigenous knowledge system significance on weather forecasting. Therefore, atmospheric and biological conditions, astronomic, as well as relief characteristics were used to predict the weather over short and long periods. Usually, in assessing weather conditions, the conduct of animals and insects were listed as essential. Obviously, in order to predict weather particularly from rain within about short period of time, astronomical characteristics were used. Commonly, there are few peers who know conventional weather prediction approaches. This lowers the reliability of conventional weather prediction. The findings revealed some variables that impact meteorological inaccuracy by scientific methods and help to recognize and evaluate the gap that current meteorological technologies do not achieve and new particulars anticipated to be filled with conventional methods to attain accurate weather prediction. Additionally, the study indicated that both modern and conventional processes have certain positive and limitations, which means that they can be coupled to generate more accurate weather prediction reports for end users.

关键词： Indigenous Knowledge Systems Meteorological Technology End Users Weather Forecasting

化学溶液方法制备涂层导体CexLa1-xO2薄膜的研究

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无机材料学报 2009年第6期24卷 1201-1204页

作者：赵跃索红莉 GRIVEL jean-claude 叶帅刘敏马麟周美玲北京工业大学材料科学与工程学院北京100124 Riso National Laboratory DK-4000 Roskilde Denmark

获得多功能单一过渡层是简化涂层导体多层结构的主要课题之一.采用化学溶液方法制备La掺杂CeO2过渡层,研究La掺杂量对CeO2薄膜表面形貌和双轴取向生长的影响.结果表明La掺杂量为10mol%的薄膜表面平整致密,且能保持锐利的双轴织构.通过... 详细信息

获得多功能单一过渡层是简化涂层导体多层结构的主要课题之一.采用化学溶液方法制备La掺杂CeO2过渡层,研究La掺杂量对CeO2薄膜表面形貌和双轴取向生长的影响.结果表明La掺杂量为10mol%的薄膜表面平整致密,且能保持锐利的双轴织构.通过多次涂敷工艺,获得具有120nm厚的Ce0.9La0.1O2过渡层.采用脉冲激光沉积方法在Ce0.9La0.1O2/NiW结构模板层上沉积了YBCO超导薄膜,其起始临界转变温度达到90.5K.这表明采用化学溶液方法制备Ce0.9La0.1O2薄膜是一种有前景的简化涂层导体多层结构的方法.

关键词：涂层导体化学溶液方法掺杂CeO2薄膜织构

NiWO4 powders prepared via polymeric precursor method for application as ceramic luminescent pigments

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journal of Advanced Ceramics 2020年第1期9卷 55-63页

作者： Naiara A.LIMA Lorena D.S.ALENCAR Máximo SIU-LI Carlos A.C.FEITOSA Alexandre MESQUITA jean-claude M’PEKO Maria I.B.BERNARDI Instituto de Física de Sao Carlos Universidade de Sao Paulo13560-970 Sao CarlosSPBrazil Instituto Federal de Mato Grosso do Sul IFMS79200-000 AquidauanaMSBrazil Departamento de Física Centro de Ciências Exatas e TecnologiaUniversidade Federal do MaranhaoUFMA65080-805Sao LuisMABrazil Instituto de Geociências e Ciências Exatas Departamento de FísicaUniversidade Estadual Paulista13506-900Rio ClaroSPBrazil

Ni WO4 was prepared using the polymeric precursor method and studied in terms of physical and chemical properties to verify its stability for industrial applications as *** characterization was accomplished using thermal analyses,X-ray diffraction(XRD),scanning electron microscopy(SEM),photoluminescence(PL)and UV–Vis spectroscopies,colorimetric coordinates,and Raman *** the temperature,successive exothermic reactions were observed and they are related with thermal decomposition of the organic *** stability was reached at^700℃.The material is verified to become completely free of second phase at^800℃.The end Ni WO4 powders showed an intense charge transfer(CT)-related tail centered in the ultraviolet region,resulting in a yellow *** addition,the powders exhibited broad excitation band and broad deep blue–green emission band,which were enhanced with increasing powders’crystallinity.

关键词： nickel tungstate yellow pigment colorimetric coordinate optical property structural characterization

Spatial and Temporal Structures of the Macrozoobenthos from the Intertidal Zone of the Kneiss Islands (Central Mediterranean Sea)

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Open journal of Marine Science 2016年第2期6卷 223-237页

作者： Nawfel Mosbahi jean-Philippe Pezy jean-claude Dauvin Lassad Neifar Laboratoire de Biodiversité et Ecosystèmes Aquatiques Faculté des Sciences de Sfax Université de Sfax Sfax Tunisie CNRS UMR 6143 M2C Laboratoire Morphodynamique Continentale et C?tière Université de Caen Normandie UNICAEN Caen France

The present study analyses the spatio-temporal variability of the macrozoobenthos from the intertidal zone of the Kneiss Islands (Gulf of Gabès, Tunisia). Samples were collected once from 34 stations, while seasonal variations were studied by sampling four times at 12 stations over the period 2013-2014. A total of 159 macrobenthos taxa associated with intertidal Zostera noltei beds are identified from the 34 stations, with a taxonomic dominance of crustaceans (32%), molluscs (29%) and annelids (27%). Abundance varies from 9244 to 36,844 ind·m-2 with a mean value of 14,346 ind·m-2. Analysis of the trophic structure shows that the majority of stations are strongly represented by carnivores (41%), followed by the non-selective deposit feeders (16%). Cluster analysis and multidimensional scaling allow identification of three main benthic assemblages based on species abundance, corresponding to different sediment types and organic matter contents. The seasonal variability in abundance, diversity and community structure is mainly due to spring and summer recruitment. The biotic indices (i.e. AMBI, BO2A and BENTIX) show that the intertidal area of Kneiss Islands exhibits a good ecological status.

关键词： Kneiss Islands Zostera noltei Spatial Distribution Seasonal Variability Benthic Macrofauna

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盘磨机低浓磨浆过程强度表征的有效性及应用

中国造纸 2023年第7期42卷 57-62,152页

作者：刘欢董继先 ROUX jean-claude 蒲永平陕西科技大学材料科学与工程学院陕西西安710021 陕西科技大学机电工程学院中国轻工业装备制造智能化重点实验室陕西西安710021 格勒诺布尔-阿尔卑斯大学 Grenoble-INP-Pagora法国格勒诺布尔F-38000

本课题采用理论分析方法研究了现有低浓磨浆强度对于不含挡坝等距直齿磨盘低浓磨浆过程的强度表征效果。结果表明,单个磨齿交错区域的净法向力(fnnet)及切向力(ftnet)是目前唯一具有实际意义的有效低浓磨浆强度,其不仅适用于不含挡坝等... 详细信息

本课题采用理论分析方法研究了现有低浓磨浆强度对于不含挡坝等距直齿磨盘低浓磨浆过程的强度表征效果。结果表明,单个磨齿交错区域的净法向力(fnnet)及切向力(ftnet)是目前唯一具有实际意义的有效低浓磨浆强度,其不仅适用于不含挡坝等距直齿磨盘低浓磨浆过程的表征,并可扩展至含挡坝磨盘及弧形齿磨盘。而具有实际意义的比边缘负荷(SELC及SELT)的应用具有一定的局限性,仅适用于恒定参数磨盘低浓磨浆过程的强度表征。实际上,低浓磨浆强度的合理建立、选择及应用不仅反映对磨浆机理的认知,且直接影响低浓磨浆过程的优化控制、齿型参数设计及选择。

关键词：制浆造纸盘磨机低浓磨浆磨浆强度表征参数

Laparoscopic management of an ectopic pregnancy after in vitro fertilization and embryo transfer at CHRACERH:A case report

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Laparoscopic, Endoscopic and Robotic Surgery 2018年第3期1卷 70-73页

作者： Belinga Etienne Noa Ndoua claude Cyrille Ayissi Gregory Kasia Onana Yves Bertrand Kasia jean-Marie Department of Gynecology and Obstetrics Faculty of Medicine and Biomedical ScienceUniversity of Yaounde IYaoundeCameroon Hospital Center for Research and Application in Endoscopic Surgery and Human Reproduction YaoundeCameroon

*** Initially,in vitro fertilization and embryo transfer(IVF-ET)was designed to solve tubal factors infertility(TFI)by placing the embryo(s)within the uterine ***,in some cases,an ectopic implantation occurs as the embryo can enter the *** pregnancy(EP)is the location of the pregnancy outside the intrauterine *** prevalence of EP following assisted reproductive technology(ART)ranges between 2.1%and 8.6%of all pregnancies and it can reach up to 11%inwomen with tubal factors infertility history.

关键词： Ectopic pregnancy Laparoscopic management In vitro fertilization Embryo transfer

Liver insulin-like growth factor 2 methylation in hepatitis C virus cirrhosis and further occurrence of hepatocellular carcinoma

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World journal of Gastroenterology 2008年第35期14卷 5419-5427页

作者： Philippe Couvert Alain Carrié jacques Pariès jenny Vaysse Audrey Miroglio Antoine Kerjean Pierre Nahon jamel Chelly jean-claude Trinchet Michel Beaugrand Nathalie Ganne-Carrié INSERM U551 Dyslipopro-teinemia and Atherosclerosis Research UnitParis F-75013France Université Paris6 UMR S551Paris F-75013France AP-HP Groupe hospitalier Pitié SalpétrièreService de Biochimie endocrinienne et OncologiqueParis F-75013France Department of Public health Jean Verdier HospitalAP-HPBondy 93140France Department of Biochemistry Jean Verdier HospitalAP-HPBondy 93140France Cochin Institut-INSERM-CNRS-University Paris 5-CHU Cochin Paris 75014France Department of Hepato-Gastroenterology Jean Verdier HospitalAP-HPBondy 93140France UPRES EA3409 University Paris 13Paris F-75651France

AIM: To assess the predictive value of the insulinlike growth factor 2 (Igf2) methylation profile for the occurrence of Hepatocellular Carcinoma (HCC) in hepatitis C (HCV) cirrhosis. METHODS: Patients with: (1) biopsy-proven compensated HCV cirrhosis; (2) available baseline frozen liver sample; (3) absence of detectable HCC; (4) regular screening for HCC; (5) informed consent for genetic analysis were studied. After DNA extraction from liver samples and bisulfite treatment, unbiased PCR and DHPLC analysis were performed for methylation analysis at the Igf2 locus. The predictive value of the Igf2 methylation profile for HCC wasassessed by Kaplan-Meier and Cox methods. RESULTS: Among 94 included patients, 20 developed an HCC during follow-up (6.9 ± 3.2 years). The methylation profile was hypomethylated, intermediate and hypermethylated in 13, 64 and 17 cases, respectively. In univariate analysis, two baseline parameters were associated with the occurrence of HCC: age (P = 0.01) and prothrombin (P = 0.04). The test of linear tendency between the three ordered levels of Igf2 methylation and probability of HCC occurrence was significant (Log Rank, P = 0.043; Breslow, P = 0.037; Tarone-Ware, P = 0.039). CONCLUSION: These results suggest that hypomethylation at the Igf2 locus in the liver could be predictive for HCC occurrence in HCV cirrhosis.

关键词： Liver cancer Cirrhosis Insulin-growth factor 2, DNA methylation